| # -*- coding: utf-8 -*- |
| # |
| #-- |
| # Copyright (C) 2009-2016 Thomas Leitner <t_leitner@gmx.at> |
| # |
| # This file is part of kramdown which is licensed under the MIT. |
| #++ |
| # |
| |
| module Kramdown::Converter::MathEngine |
| |
| # Uses the MathJax javascript library for displaying math. |
| # |
| # Note that the javascript library itself is not include or linked, this has to be done |
| # separately. Only the math content is marked up correctly. |
| module Mathjax |
| |
| def self.call(converter, el, opts) |
| type = el.options[:category] |
| text = (el.value =~ /<|&/ ? "% <![CDATA[\n#{el.value} %]]>" : el.value) |
| text.gsub!(/<\/?script>?/, '') |
| |
| preview = preview_string(converter, el, opts) |
| |
| attr = {:type => "math/tex#{type == :block ? '; mode=display' : ''}"} |
| if type == :block |
| preview << converter.format_as_block_html('script', attr, text, opts[:indent]) |
| else |
| preview << converter.format_as_span_html('script', attr, text) |
| end |
| end |
| |
| def self.preview_string(converter, el, opts) |
| preview = converter.options[:math_engine_opts][:preview] |
| return '' unless preview |
| |
| preview = (preview == true ? converter.escape_html(el.value) : preview.to_s) |
| |
| preview_as_code = converter.options[:math_engine_opts][:preview_as_code] |
| |
| if el.options[:category] == :block |
| if preview_as_code |
| converter.format_as_block_html('pre', {'class' => 'MathJax_Preview'}, |
| converter.format_as_span_html('code', {}, preview), |
| opts[:indent]) |
| else |
| converter.format_as_block_html('div', {'class' => 'MathJax_Preview'}, preview, |
| opts[:indent]) |
| end |
| else |
| converter.format_as_span_html(preview_as_code ? 'code' : 'span', |
| {'class' => 'MathJax_Preview'}, preview) |
| end |
| end |
| |
| end |
| |
| end |
